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Subsidence Due to Underground Mining (In Two Parts). 1. Theory and Practices in Predicting Surface Deformation.

Authors
Braeuner-G
Source
NTIS: PB 220 495 :56 pages
Link
NIOSHTIC No.
10000956
Abstract
The report gives a review of the methods of predicting mine subsidence; these methods are used particularly in European coalfields. The methods are subdivided into two groups, based on mathematical expressions either for the trough profile or for the influence of infinitesimal extraction elements. The fundamental relationships common to all methods described herein are the principles of superposition and of equivalent extraction areas. The involved parameters are derived from field observations. For calculating horizontal displacements, their relation to the slope of the subsidence profile is applied. The time-dependent development of the subsidence process is characterized by the empirical "time factor." Modifications for the case of inclined strata are considered. A brief review of experimental and theoretical model investigations is given.
Publication Date
19730101
Document Type
IH; Information Circular;
Fiscal Year
1973
NTIS Accession No.
PB-220495
NTIS Price
A05
Identifying No.
IC 8571
NIOSH Division
DRC;
Source Name
NTIS: PB 220 495
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